The pixiv id '山咲まさと' is just the writer of this doujinshi, not the artist. There's a circle named after Yamasaki Masato(山咲まさと), the 'dennou yamasaki gumi'(電脳山咲組, 'cyber yamasaki team'), seems to be a group of artist cooperating with yamasaki, including Mr. Izayoi. So don't just tag 'Izayoi_Seishin(十六夜清心)' on every picture from the pixiv id '山咲まさと'. The artist of this doujinshi is Shinobu(詩乃譜). Below is the doujinshidb page for this artist. http://doujinshi.mugimugi.org/browse/author/29088/